Visit the entire call graph in DependencyCollector

[libs/gl.git] / source / glsl / optimize.h

diff --git a/source/glsl/optimize.h b/source/glsl/optimize.h
index 249a859a03763c6e198b9c0f04020dc0589ea360..e21dd98fd0fcbe63e578e3012cd072d108c5437d 100644 (file)
--- a/source/glsl/optimize.h
+++ b/source/glsl/optimize.h
@@ -27,7 +27,7 @@ private:
 
 /** Finds functions which are candidates for inlining.  Currently this means
 functions which have no flow control statements, no more than one return
-statement, and are only called once. */
+statement, and are either builtins or only called once. */
 class InlineableFunctionLocator: private TraversingVisitor
 {
 private:
@@ -227,6 +227,26 @@ private:
        virtual void visit(Iteration &);
 };
 
+class UnreachableCodeRemover: private TraversingVisitor
+{
+private:
+       bool reachable;
+       std::set<Node *> unreachable_nodes;
+
+public:
+       UnreachableCodeRemover();
+
+       virtual bool apply(Stage &);
+
+private:
+       virtual void visit(Block &);
+       virtual void visit(FunctionDeclaration &);
+       virtual void visit(Conditional &);
+       virtual void visit(Iteration &);
+       virtual void visit(Return &) { reachable = false; }
+       virtual void visit(Jump &) { reachable = false; }
+};
+
 /** Removes types which are not used anywhere. */
 class UnusedTypeRemover: private TraversingVisitor
 {